REPEATER, RADIO COMMUNICATION SYSTEM, COMMUNICATION RANGE EXPANDING METHOD, AND RADIO COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To provide a repeater, etc., capable of performing stable radio authentication operation while maintaining security and secrecy. SOLUTION: When the repeater functions as a master repeater, a data processing part receives a second identification code for identifying other repeaters from the other repeaters to store the second identification code in a memory, and transmits a first identification code stored in the memory to the other repeaters to perform a pairing operation with the other repeaters. When the repeater functions as a slave repeater, the data processing part receives a third identification code being an identification code of a master repeater only from the master repeater among the other repeaters to store the third identification code in the memory, and transmits the first identification code stored in the memory to the master repeater to perform a pairing operation. COPYRIGHT: (C)2009,JPO&INPIT